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The moduli space of abelian surfaces with polarisation of type (1,t) and a bilevel structure is of general type if t is odd and at least 17.

Algebraic Geometry · Mathematics 2007-05-23 G. K. Sankaran

We construct a new surface of general type with p_g=0 and K^2=8 and prove that its universal cover can not be the bidisc.

Algebraic Geometry · Mathematics 2011-05-19 Stephen Coughlan

There is a canonical identification, due to the author, of a convex real projective structure on an orientable surface of genus g and a pair consisting of a conformal structure together with a holomorphic cubic differential on the surface.…

Differential Geometry · Mathematics 2007-05-23 John C. Loftin

We present a complete classification of complex projective surfaces $X$ with nontrivial self-maps (i.e. surjective morphisms $f:X\rightarrow X$ which are not isomorphisms) of any given degree. The starting point of our classification are…

Algebraic Geometry · Mathematics 2010-11-30 Antonio Rapagnetta , Pietro Sabatino

We investigate the following conjecture: all compact non-K\"ahler complex surfaces admit birational structures. After Inoue-Kobayashi-Ochiai, the remaining cases to study are essentially surfaces in class VII_0^+. In case of Kato surfaces…

Complex Variables · Mathematics 2016-01-13 Georges Dloussky

We analyze the moduli space of non-flat homogeneous affine connections on surfaces. For Type $\mathcal{A}$ surfaces, we write down complete sets of invariants that determine the local isomorphism type depending on the rank of the Ricci…

Differential Geometry · Mathematics 2016-04-25 Miguel Brozos-Vázquez , Eduardo García-Río , P. Gilkey

In any dimension at least five we construct examples of closed smooth manifolds with the following properties: 1) they have neither real projective nor flat conformal structures; 2) their fundamental group is a non-elementary Gromov…

Differential Geometry · Mathematics 2023-06-21 Lorenzo Ruffoni

Let $Z'\subset \mathbb{P}^{n}$ be a smooth projective hypersurface of degree $d>1$ and let $Z\to \mathbb{P}^n$ be the $\mu_d$-cover totally ramified along $Z'$. We relate full level $d$ structures on the primitive cohomology $Z'$ with full…

Algebraic Geometry · Mathematics 2026-02-19 Eduard Looijenga

Any quasi-isometry of the complex of curves is bounded distance from a simplicial automorphism. As a consequence, the quasi-isometry type of the curve complex determines the homeomorphism type of the surface.

Geometric Topology · Mathematics 2019-12-19 Kasra Rafi , Saul Schleimer

Let $S$ be a nonsingular minimal complex projective surface of general type and the canonical map of $S$ is generically finite. Beauville showed that the geometric genus of the image of the canonical map is vanishing or equals the geometric…

Algebraic Geometry · Mathematics 2016-12-30 Rong Du

A recent construction of Hacking relates the classification of stable vector bundles on a surface of general type with $p_g = 0$ and the boundary of the moduli space of deformations of the surface. In the present paper we analyze this…

Algebraic Geometry · Mathematics 2014-02-04 Anna Kazanova

This paper is an addendum to [4], in which the authors constructed a simply connected minimal complex surface of general type with p_g=0 and K^2=3. In this paper we construct a new non-simply connected minimal surface of general type with…

Algebraic Geometry · Mathematics 2008-03-26 Heesang Park , Jongil Park , Dongsoo Shin

As the sequel to [3], we construct a minimal complex surface of general type with p_g=0, K^2=2 and H_1=Z/2Z using a rational blow-down surgery and Q-Gorenstein smoothing theory. We also present an example of p_g = 0,K^2 = 2 and H_1 = Z/3Z.

Algebraic Geometry · Mathematics 2008-09-08 Yongnam Lee , Jongil Park

We find new examples of complex surfaces with countably many non-isomorphic algebraic structures. Here is one such example: take an elliptic curve $E$ in $\mathbb P^2$ and blow up nine general points on $E$. Then the complement $M$ of the…

Complex Variables · Mathematics 2023-03-21 Anna Abasheva , Rodion Déev

Esnault-Viehweg developed the theory of cyclic branched coverings $\tilde X\to X$ of smooth surfaces providing a very explicit formula for the decomposition of $H^1(\tilde X,\mathbb{C})$ in terms of a resolution of the ramification locus.…

Algebraic Geometry · Mathematics 2020-01-28 E. Artal Bartolo , J. I. Cogolludo-Agustín , Jorge Martín-Morales

A method of defining the complex structure(moduli) for dynamically triangulated(DT) surfaces with torus topology is proposed. Distribution of the moduli parameter is measured numerically and compared with the Liouville theory for the…

High Energy Physics - Lattice · Physics 2009-10-28 H. Kawai , N. Tsuda , T. Yukawa

This note describes minimal surfaces $S$ of general type satisfying $p_g\geq 5$ and $K^2=2p_g$. For $p_g\geq 8$ the canonical map of such surfaces is generically finite of degree 2 and the bulk of the paper is a complete characterization of…

Algebraic Geometry · Mathematics 2010-03-19 Maria Marti Sanchez

Mumford defined a natural isomorphism between the intermediate jacobian of a conic-bundle over $P^2$ and the Prym variety of a naturally defined \'etale double cover of the discrminant curve of the conic-bundle. Clemens and Griffiths used…

alg-geom · Mathematics 2008-02-03 E. Izadi

Regular algebraic surfaces isogenous to a higher product of curves can be obtained from finite groups with ramification structures. We find unmixed ramification structures for finite groups constructed as p-quotients of particular infinite…

Group Theory · Mathematics 2011-09-29 Nathan Barker , Nigel Boston , Norbert Peyerimhoff , Alina Vdovina

We show that the Kulikov surfaces form a connected component of the moduli space of surfaces of general type with p_g=0 and K^2=6. We also give a new description for the surfaces, extending ideas of Inoue. Finally we calculate the…

Algebraic Geometry · Mathematics 2015-01-14 Tsz On Mario Chan , Stephen Coughlan
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